Lock Box: A no fee service with a shorter hold time for sending money via money order, personal check, or cashierâs checks. Mail funds directly to the institution: Never a fee. All funds except Certified Funds are subject to a 30 day hold.
1 The number of octagon diagonals is 20. 2  The sum of all interior angle = 1080 degrees. 3  Since the sides for an regular octagon are equal, the interior angle at each vertex is = $\frac{1080}{8}$ = 135 degrees. 4  The total exterior angle is 360 degrees.
A polygon will always have the same number angles as sides. So a decagon has 10 angles. The sum of measures of interior angles (inside the angles) of a polygon is 180 * (n - 2) where n is the number of angles in the polygon. For a decagon, it would be 1440 degrees. To find the measure of one interior angle of a congruent polygon, (all sides are equal and all angles are equal), divide by n. This gives you 144 degrees for a congruent decagon. 285 Views Â· View Upvoters